Ian928

I did not want to bump my old thread about brakes up because it kind of went off topic, and I did not want to mess up Brendans thread with this, so here goes:

I contacted K-Sport regarding a brake kit for my 1980 Euro S, and they told me they would make a kit for my car if I took the measurements needed. The cost of the kit should be the same as their other kits because they could then list this kits and maybe sell a few. There are no prices on their website, but it seems their 330mm/8pot kits are around $1500 (from a swedish company selling the kits).

This is info from K-Sport:

We can offer 6 sizes of brake kit, 6 piston 286 or 304mm which are probably too small (for 15 and 16" wheels) 8 piston 330mm and 356mm kits (for 17 and 18" wheels). We do larger kits too for 19 and 20" wheels.

I am leaning towards a 330mm 8 piston kit.

Does anybody know K-Sport? I have googled and what I found was generally OK.

I am not a brake expert, but I understand that the piston area of a replacement caliper can not be much different from the piston area of the original caliper or else the master cylinder may be to small and long travel (or even bottoming out?) may be the result.

Lastly, what are the possibilities for rear brakes? I know it is not allowed to use a hydraulic handbrake, so that probably leaves me with GTS(is S4 the same?) setup as the biggest available with the original handbrake?

K-Sport homepage: http://www.ksport.co.uk/index.asp

RyanPerrella

there are allot of things that would steer me away from this product.

where do i start????

Ian,

I think there is allot of stuff from other 928's even that you can relatively easily bolt onto your car for much less money.

Ian928

You are welcome to tell me!

I am in the strange position of needing to fit bigger brakes to be allowed to increase power of the car (government rules). I do not intend to race the car neither do I find the original brakes too weak.

I am guessing one of the reasons you don't recommend them are because the calipers are not cast?

Lizard928

Actually Ryan, I wouldnt say that right away.

Though more information would be needed.

availibility or Rotors, rotor material, aluminum hats, etc.

RyanPerrella

wouldnt say what? about going with some other porsche system or K sports?

If you go with this company you need their rotors, pads calipers and where do you get parts from them, how old is this company. I saw they were making dampers for cars at a reduced cost but all those that have fitted them say they are complete crap.

now i dont know how easy it is to adapt later brakes to an 80 model car, you got me there but i would look towards that route before getting into bed with "K Sport"

Ian928

I am sorry I did not see the last until now. I can not use S4 or GTS brakes because the highest output cars these were used on was 330 and 350hp (as I am avare of). The best option is 928Specialists kit with original parts, but I thought I would consider other options also...

RyanPerrella

your in Norway, i see

Seems like a silly rule to throw on bigger brakes if you make more power. I get the logic but Porsche brakes are the best in the industry in general terms. I can see this being a good law on hondas or subaru's or something, but i dont think it should apply to porsches. Maybe 80's 928's yeah, but not an S4 or GTS.

it sounds like they just want size, doesnt matter how, just size, even if its inferior.......

Lizard928

Ryan,

You dont have to use their calipers, you could use just their rotors and hats.

But yes availibility would be my biggest concern!

If you have an earlier car then yes you may use their calipers, but I would try to find a few people who have/still do run them and see what they think.

but brakes are not exactly a complex technology.

RyanPerrella

I have only heard about Ksports suspension but it sucks, it looks nice but is totally useless otherwise

i have to imagine that not much thought went into their brakes either.

I am generalizing, but since you asked, i thought i would share what ive heard about this company.

if you must have larger rotors then you must have larger rotors. I have to imagine someone here has a better solution though

IcemanG17

By far the easiest upgrade would be the GTS Big red upgrade for the front......most of the 928 vendors sell them and its an easy upgrade!!

Ian928

Yes I know, but I don't think I will get away with claiming that adding a supercharger to my car does not raise power above 350hp. With 993TT calipers and rotors as 928Specialists kit consist of I can claim that the 993TT was delivered with 450hp and maybe I will be allowed to get the car approved with 400-450hp.

I guess this is strange rules, but that is just the way it is here in Norway.

Ian928

I did a search here (I did search for K-Sport brake kit before posting here but got no hits) and you are right there was at least one person that had a lot of issues with their coilover kit and it had lots of issues. Well, it seems too risky then.

Jim bailey - 928 International

So what exactly does the law say ? Your car will already do 160 MPH or so ! and has great brakes. How do they KNOW that any aftermarket set up is good or bad ?

Jim bailey - 928 International

So what exactly does the law say ? Your car will already do 160 MPH or so ! and has great brakes. How do they KNOW that any aftermarket set up is good or bad ? Do they KNOW what is on there now ? very interesting.

Ian928

I am in fact not sure what kind of "proof" they need, i know it is a lot easier if you use brakes that are from another car with known power and weight. If not, everything is probably physics: so many % larger discs, so many % larger piston area, so many % larger pad area. I don't think they know or will check what is on there now, but I need to document it.

I believe they do not consider the quality of the aftermarket setup, only the physics. There are a few factors that they are really hung up on and that is brakes and weight. I would not be alloved to put a 100hp diesel engine in my 928 if the weight of that engine was higher than the weight of the 928 engine for instance. Another thing is jacking-up and fitting bigger wheels on 4x4s, this is extremely strickt.

Yes the car is capable of great speed and has good brakes, but even so Porsche saw the need to upgrade the brakes as power increased. These guys sign with their personal name that this car considered by them as safe to use, so I guess they must be allowed to ask: Would Porsche have used the "S" brakes on a 450hp version of the 928?